How IQ tests work
Can you study for an IQ test?
You can practice for an IQ test, but you cannot study your way to a higher IQ. What practice changes, why the gain is not intelligence, and how to prepare fairly.
WhatIQ Editorial13 мин чтения
How IQ tests work
How IQ tests are built, timed, scored and normed, from matrix puzzles to item response theory.
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Online and clinical tests
Where to take an IQ test
You can take an IQ test with a psychologist, through a public school, at a university training clinic, at a Mensa session or online. Here is what each gives you and how to choose by what you need the score for.
WhatIQ Editorial14 мин чтения
How IQ tests work
How long does an IQ test take?
Pearson lists 45 minutes for the Full Scale IQ on the WAIS-5 and 15 to 30 minutes for the WASI-II, and American Mensa says one to two hours (both read October 2026). Times for each test.
WhatIQ Editorial13 мин чтения
IQ scores
The IQ bell curve: how scores are spread
IQ scores sit on a normal curve with an average of 100 and a standard deviation of 15. The share of people in each band, why tests build the scale that way, and where real data fit it less well.
WhatIQ Editorial11 мин чтения
IQ scores
IQ percentile: what your score means
An IQ percentile compares you with a test's norm group. It does not count right answers. A score-to-percentile chart, the calculation, and why your percentile is a range.
WhatIQ Editorial11 мин чтения
How IQ tests work
What is abstract reasoning?
Abstract reasoning means finding the rule behind patterns you have not seen before. What it is, everyday and test examples, how it relates to fluid intelligence and IQ, and why the UCAT dropped its section.
WhatIQ Editorial14 мин чтения
Intelligence research
EQ vs IQ: what is the difference?
IQ and emotional intelligence are measured in very different ways. What each score means, how much they overlap, what research says each predicts at school and work, and where the popular EQ numbers come from.
WhatIQ Editorial13 мин чтения
Online and clinical tests
What is the WAIS IQ test?
The Wechsler Adult Intelligence Scale, now Pearson's WAIS-5 from 2024, is a one-to-one clinical IQ test. What changed from the WAIS-IV, what it costs, and why a free online WAIS quiz is not the real test.
WhatIQ Editorial15 мин чтения
Online and clinical tests
What is the Stanford-Binet test?
The Stanford-Binet Intelligence Scales, Fifth Edition (Roid, 2003) is a one-to-one clinical IQ test with 10 subtests and five factors (PRO-ED). How it is given and scored, and why online quizzes differ.
WhatIQ Editorial13 мин чтения
How IQ tests work
What does an IQ test measure?
A full IQ test such as the WAIS-5 (Pearson, 2024) samples five abilities and combines them into one score. Raven's matrix test uses a single type of item (APA task force, 1996).
WhatIQ Editorial11 мин чтения
How IQ tests work
What are Raven's Progressive Matrices?
Raven's Progressive Matrices are nonverbal reasoning tests in which you pick the piece that completes a pattern. Scores are compared with an age-based norm group, and the test uses only one kind of puzzle.
WhatIQ Editorial11 мин чтения
Online and clinical tests
Are IQ tests accurate?
Calculated from the WAIS-5's 0.97 reliability (2024), a clinical IQ score has a 95% range of about 5 points either side. Online tests vary, and most free quizzes publish no data.
WhatIQ Editorial12 мин чтения
Intelligence research
What is fluid intelligence?
Fluid intelligence is the ability to reason and solve new problems without relying on what you already know (PNAS, 2008). Learn how it differs from crystallized intelligence and how it is measured.
WhatIQ Editorial12 мин чтения
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